Toshiba T2N User Manual download pdf (Page 158)

2. User Program Configuration

User's manual 145

2.3.3

Interrupt Program

There are a total of 5 types of interrupt program. These are 1 fixed-cycle

interrupt program which is executed cyclically with specified cycle time in

system information, and 4 I/O interrupt programs (#1 - #4) which are

started by interrupt signals from I/O modules with interrupt functions.

●

Fixed cycle timer interrupt program

This is executed cyclically with a cycle which is registered in the

system information. The allowable setting is 5 to 1000ms (5ms

units). When no cycle is registered (blank), it is not executed.

●

I/O interrupt programs (#1 - #4)

These are started by interrupt signals generated by I/O modules

with the corresponding interrupt functions. The coordination

between the interrupt program numbers and the I/O modules with

interrupt function is fixed as shown below.

For details of interrupt program operation, see Part 2 Section 3.3.

When automatic I/O allocation is executed in the state with interrupt I/O*

mounted, for coordination between the interrupt program munber and

the interrupt I/O, the lower number I/O interrupt programs are allocated

in sequence from the interrupt I/O closest to the CPU.

*) I/O modules with interrupt are under development

Each interrupt program must be ended by an IRET instruction.

NOTE

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Toshiba T2N User Manual Page 158